Stability interaction effects in 3D steel frames: a case study

Bert Snijder, Luuk H.J.D. Titulaer, Paul A. Teeuwen, Herm Hofmeyer

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

3D steel frames are usually assessed by checking their columns and beams separately using design rules, e.g. EN 1993-1-1 (Eurocode 3). For this, the force distribution in the 3D steel frame is determined first, followed by cross-sectional resistance and member stability checks. When increasing the load on the frame, the first critical check defines the ultimate load. This paper presents a case study in which a 3D steel frame is assessed both by code checking and by more realistic numerical simulations by the finite element method (FEM). It shows that the code checking approach overestimates the ultimate load of the FEM approach. The FEM simulations show simultaneous failure of beams and columns and naturally take into account the mutual stiffness interaction of unstable beams and columns. As the latter is not the case for the design rules used in the code checking approach, the suggestion is made that the current design rules predict too high values for this reason. As similar findings are obtained for 2.5D and 2D
frames, further research is needed, including full scale experiments.
Original languageEnglish
Title of host publicationProceedings of the International Colloquia on Stability and Ductility of Steel Structures (SDSS 2019), September 11-13, 2019, Prague, Czech Republic
EditorsF. Wald, M. Jandera
Place of PublicationBoca Raton
PublisherCRC Press Taylor & Francis Group
Pages1025-1033
Number of pages8
ISBN (Electronic)9780429320248
Publication statusPublished - 2019
EventThe International Colloquia on Stability and Ductility of Steel Structures (SDSS 2019) - Prague, Czech Republic
Duration: 11 Sep 201913 Sep 2019

Conference

ConferenceThe International Colloquia on Stability and Ductility of Steel Structures (SDSS 2019)
CountryCzech Republic
CityPrague
Period11/09/1913/09/19

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